Hi, look at this Link i hope it will help you. Multihoming for the Small ISP http://www.netaxs.com/~freedman/multi.html MFG Holger Zarwel Deutsche Telekom Technikniederlassung Schwdbisch Hall SCe-IP 5 Hausanschrift: Maybachstrasse 57, 70469 Stuttgart Postanschrift: Postfach 50 20 30, 70369 Stuttgart Telefon: 0711/270-2005 Telefax: 0711/270-2048 eMail: eMail: -----Urspr|ngliche Nachricht----- Von: Evans, TJ [mailto:[EMAIL PROTECTED]] Gesendet am: Donnerstag, 7. Juni 2001 16:50 An: [EMAIL PROTECTED] Betreff: RE: BGP for 2 T1's to one LAN [7:7511] I'll take a stab at some of this ... First - If I recall, and I may very well be wrong here, I though DNS round-robin was solely for load-sharing, not redundancy. Second - Regarding BGP multi-homing ... some "gotchya's" that we ran into: You will need an ASN Some ISP's have netblocks designated as re-routable, if your netblock isn't one of them they will make you re-address . Some ISP's require a /24 netblock to be used for BGP routing Some ISP's require that you also register your maintainer object with RADB Routers must have 64mb RAM for partial/default routes and be BGP capable Also, since you are doing this for fault-tolerance reasons, I would also recommend using: two separate routers ... each with 1 WIC and 2 FastEthernet interfaces the WIC --> ISP Fast 0/0 --> your LAN , running HSRP Fast 0/1 --> other router ... this will be for iBGP And you could then multi-home each of your servers to each of the switches and use NIC teaming for redundancy there In this case - all of your outbound traffic will use the ISP connected to the router with the "active" HSRP address, while all inbound traffic will come in via the ISP with the lowest BGP 'cost' from the source ... not balancing, but load sharing . I am probably forgetting something here, but the idea is to have no single point of failure :) Thanks! TJ -----Original Message----- We are trying to have the web servers in our LAN accessible to the internet via 2 T1's from different providers -- more for redundancy than load sharing, though that matters too. Currently we have 2 T1's, each giving us a different set of IP addresses. That just lets us put some sites on each T1 -- doesn't give us an ounce of redundancy. I've been told that if we get a router with 2 WIC's that can speak BGP (Cisco 2600 or better) that may solve our problem. I'm very new to routing, so can someone answer some basic questions? Thanks in advance. -- Daniel Wilson, BSCS, MCP Application Developer http://www.compusoftsolutions.com/ ***************************************************************************** The information in this email is confidential and may be legally privileged. It is intended solely for the addressee. Access to this email by anyone else is unauthorized. If you are not the intended recipient, any disclosure, copying, distribution or any action taken or omitted to be taken in reliance on it, is prohibited and may be unlawful. When addressed to our clients any opinions or advice contained in this email are subject to the terms and conditions expressed in the governing KPMG client engagement letter. ***************************************************************************** Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=7530&t=7511 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
